Perennials; culm tufted, glabrous, stout, mostly 50-150 cm tall; rhizome short. Blade glabrous;
ligule 2-4 mm long, truncate, membranaceous, glabrous. Racemes usually 5-10, 6-8 cm long, axils of
racemes pilose. Spikelets ovate-pointed, 3-3.5 mm long, green or purplish, in pairs, one subsessile and
other shortly pedicelate; lower glume absent; upper glume and lower lemma membranaceous, 5-9-
veined, margins fringed with long silky hairs, sparsely covered with silky hairs all over; upper lemma
orbicular, ca. 2 mm long, rounded, coriaceous; anther ca. 1 mm long.
TAIPEI: Shimen, Kao 3581. TAICHUNG: Kukuan, Hsu 668. PINGTUNG: Kenting, Hsu 521.
Orinally from South America, naturalized elsewhere. Taiwan, common on waste grounds in northern
Taiwan.
midrib 中肋: (la)large:several vascular bundles
leaf surface 表面: (fla)flat surface
sclerenchyma 厚壁組織: (mistr)strand variable with size of vein
chlorenchyma 葉綠組織: (radia)cells radiate and lesser than bundle sheath cell in width
bundle sheath 維管束鞘: (sk)single bundle sheath with conspicuous chloroplast
buliform cells not well developed 泡狀細胞不發達: (irreg)epidermal cells irregular in size
chlorenchyma cell number between two adjacent veins: 2
chloroplast form in bundle sheath 束鞘細胞內之葉綠體型式: (out)large amount and in centrifugal site
mestome sheath 內束鞘細胞: (Xyms -)metaxylem pole adjacent with outer bundle sheath
distance between two adjancent vein 脈間距: 95 micrometer
length/weidth ratio of bundle sheath in LS 束鞘細胞縱面長寬比: 2
chlorenchyma cell shape in LS 葉綠細胞縱面形狀: lobed
